package com.windward.vii.utils;

import com.windward.vii.dao.entity.AssetUserAccount;
import com.windward.vii.dao.entity.User;
import com.windward.vii.domain.user.UserVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * Created by tiansj on 2017/8/20.
 */
public class UserUtils {

    public static UserVO toUserVO(AssetUserAccount user) {
        if (user != null) {
            UserVO userVO = new UserVO();
            copyPropertiesIgnoreNull(user, userVO);
            return userVO;
        }
        return null;
    }
    public static List<UserVO> toUserVO(List<AssetUserAccount> origList) {
        List<UserVO> destList = new ArrayList<>();
        if (origList != null && origList.size() > 0) {
            for (AssetUserAccount userAccount : origList) {
                UserVO userVO = new UserVO();
                copyPropertiesIgnoreNull(userAccount, userVO);
                destList.add(userVO);
            }
        }
        return destList;
    }


    public static String[] getNullPropertyNames (Object source) {
        final BeanWrapper src = new BeanWrapperImpl(source);
        java.beans.PropertyDescriptor[] pds = src.getPropertyDescriptors();

        Set<String> emptyNames = new HashSet<String>();
        for(java.beans.PropertyDescriptor pd : pds) {
            Object srcValue = src.getPropertyValue(pd.getName());
            if (srcValue == null) emptyNames.add(pd.getName());
        }
        String[] result = new String[emptyNames.size()];
        return emptyNames.toArray(result);
    }

    public static void copyPropertiesIgnoreNull(Object src, Object target){
        BeanUtils.copyProperties(src, target, getNullPropertyNames(src));
    }

}
